참깨 開花 登熟에 關한 硏究 Ⅹ. 참깨 有限 新草型의 開花 및 착삭習性

Studies on the flowering and maturity in sesame Ⅹ. Flowering and capsule setting habit on newly developed determinate plant types

This experiment was performed to investigate the flowering and capsule setting habit of newly developed determinate mutant in sesame (Sesamum indicum L.). Varieties tested could be classified into new plant type by it’s morphological trait of determinance with capsule shape, capsule setting and branching habit compared to reported 9 different plant types in this series. Flowers were appeared progressively toward the tip of the main stem and also toward the tips of branches except the terminal flower flowering at the 2nd day on each main stem and branchs of DBTB terminal (Determinate, Branches, Tricapsules, Bicarpels Quadriloculi) type. Flowers and capsules were beared on secondary branches in DBTB type which is contrasted with unbearing secondary branches in indeterminate type. Flowering order of DBTB type was the earliest on main stem, intermediate on primary branches and the latest on secondary branches, and flowers were appeared progressively from upper part toward lower part in primary branches. DBTB type showed higher inflorescence due to 12 days shorter flowering period compared to that of indeterminate type therefore this will be idealistic character for the purpose of breeding combining harvester adapting varieties in sesame. Capsule bearing ratio was the highest on main stem, intermediate on primary branches and the lowest on secondary branches in DBTB type. Capsule bearing ratio of DBTB type showed decreasing tendancy day by day after first flowering. DBTB type was considered as ideal plant type for labour saving combining harvesting with higher yield ability due to it’s higher inflorescence, flowering and capsule bearing on even secondary branches which do not develop in indeterminate plant types.